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题名: The SM extension with color-octet scalars: diphoton enhancement and global fit of LHC Higgs data
作者: Cao, JJ ;  Wan, PH ;  Yang, JM ;  Zhu, JY
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2013
期号: 8, 页码:9
关键词: ELECTROWEAK SYMMETRY-BREAKING ;  EQUIVALENCE THEOREM ;  STANDARD MODEL ;  PRECISE FORMULATION ;  BOSON ;  ANATOMY ;  BOUNDS ;  MASS
学科分类: Physics
通讯作者: Cao, JJ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China.
部门归属: [Cao, Junjie; Wan, Peihua] Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China; [Cao, Junjie] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China; [Yang, Jin Min; Zhu, Jingya] Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
英文摘要: In light of the significant progress of the LHC to determine the properties of the Higgs boson, we investigate the capability of the Manohar-Wise model in explaining the Higgs data. This model extends the SM by one family of color-octet and isospin-doublet scalars, and it can sizably alter the coupling strengths of the Higgs boson with gluons and photons. We first examine the current constraints on the model, which are from unitarity, the LHC searches for the scalars and the electroweak precision data (EWPD). In implementing the unitarity constraint, we use the properties of the SU(3) group to simplify the calculation. Then in the allowed parameter space we perform a fit of the model, using the latest ATLAS and CMS data, respectively. We find that the Manohar-Wise model is able to explain the data with chi(2) significantly smaller than the SM value. We also find that the current Higgs data, especially the ATLAS data, are very powerful in further constraining the parameter space of the model. In particular, in order to explain the gamma gamma enhancement reported by the ATLAS collaboration, the sign of the hgg coupling is usually opposite to that in the SM.
资助者: National Natural Science Foundation of China (NNSFC) [10775039, 11075045, 11275245, 10821504, 11135003]; Specialized Research Fund for the Doctoral Program of Higher Education [20104104110001]; Project of Knowledge Innovation Program (PKIP) of Chinese Academy of Sciences [KJCX2.YW.W10]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000324113700009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15301
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Cao, JJ,Wan, PH,Yang, JM,et al. The SM extension with color-octet scalars: diphoton enhancement and global fit of LHC Higgs data[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(8):9.
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